diff --git a/glamor/glamor_pixmap.c b/glamor/glamor_pixmap.c
index 8dbeb2220..00e38277d 100644
--- a/glamor/glamor_pixmap.c
+++ b/glamor/glamor_pixmap.c
@@ -1512,132 +1512,3 @@ glamor_fixup_pixmap_priv(ScreenPtr screen, glamor_pixmap_private *pixmap_priv)
 
     return ret;
 }
-
-/*
- * We may use this function to reduce a large pixmap to a small sub
- * pixmap. Two scenarios currently:
- * 1. When fallback a large textured pixmap to CPU but we do need to
- * do rendering within a small sub region, then we can just get a
- * sub region.
- *
- * 2. When uploading a large pixmap to texture but we only need to
- * use part of the source/mask picture. As glTexImage2D will be more
- * efficient to upload a contingent region rather than a sub block
- * in a large buffer. We use this function to gather the sub region
- * to a contingent sub pixmap.
- *
- * The sub-pixmap must have the same format as the source pixmap.
- *
- * */
-PixmapPtr
-glamor_get_sub_pixmap(PixmapPtr pixmap, int x, int y, int w, int h,
-                      glamor_access_t access)
-{
-    glamor_screen_private *glamor_priv;
-    PixmapPtr sub_pixmap;
-    glamor_pixmap_private *sub_pixmap_priv, *pixmap_priv;
-    void *data;
-    int pbo;
-    int flag;
-
-    if (x < 0 || y < 0)
-        return NULL;
-    w = (x + w) > pixmap->drawable.width ? (pixmap->drawable.width - x) : w;
-    h = (y + h) > pixmap->drawable.height ? (pixmap->drawable.height - y) : h;
-
-    glamor_priv = glamor_get_screen_private(pixmap->drawable.pScreen);
-    pixmap_priv = glamor_get_pixmap_private(pixmap);
-
-    if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
-        return NULL;
-    if (glamor_priv->gl_flavor == GLAMOR_GL_ES2 ||
-        pixmap_priv->type == GLAMOR_TEXTURE_LARGE)
-        flag = GLAMOR_CREATE_PIXMAP_CPU;
-    else
-        flag = GLAMOR_CREATE_PIXMAP_MAP;
-
-    sub_pixmap = glamor_create_pixmap(pixmap->drawable.pScreen, w, h,
-                                      pixmap->drawable.depth, flag);
-
-    if (sub_pixmap == NULL)
-        return NULL;
-
-    sub_pixmap_priv = glamor_get_pixmap_private(sub_pixmap);
-    pbo =
-        sub_pixmap_priv ? (sub_pixmap_priv->base.fbo ? sub_pixmap_priv->base.
-                           fbo->pbo : 0) : 0;
-
-    if (pixmap_priv->base.is_picture) {
-        sub_pixmap_priv->base.picture = pixmap_priv->base.picture;
-        sub_pixmap_priv->base.is_picture = pixmap_priv->base.is_picture;
-    }
-
-    if (pbo)
-        data = NULL;
-    else
-        data = sub_pixmap->devPrivate.ptr;
-
-    data =
-        glamor_download_sub_pixmap_to_cpu(pixmap, x, y, w, h,
-                                          sub_pixmap->devKind, data, pbo,
-                                          access);
-    if (data == NULL) {
-        fbDestroyPixmap(sub_pixmap);
-        return NULL;
-    }
-    if (pbo) {
-        assert(sub_pixmap->devPrivate.ptr == NULL);
-        sub_pixmap->devPrivate.ptr = data;
-        sub_pixmap_priv->base.fbo->pbo_valid = 1;
-    }
-#if 0
-    struct pixman_box16 box;
-    PixmapPtr new_sub_pixmap;
-    int dx, dy;
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = w;
-    box.y2 = h;
-
-    dx = x;
-    dy = y;
-
-    new_sub_pixmap = glamor_create_pixmap(pixmap->drawable.pScreen, w, h,
-                                          pixmap->drawable.depth,
-                                          GLAMOR_CREATE_PIXMAP_CPU);
-    glamor_copy_n_to_n(&pixmap->drawable, &new_sub_pixmap->drawable, NULL, &box,
-                       1, dx, dy, 0, 0, 0, NULL);
-    glamor_compare_pixmaps(new_sub_pixmap, sub_pixmap, 0, 0, w, h, 1, 1);
-#endif
-
-    return sub_pixmap;
-}
-
-void
-glamor_put_sub_pixmap(PixmapPtr sub_pixmap, PixmapPtr pixmap, int x, int y,
-                      int w, int h, glamor_access_t access)
-{
-    void *bits;
-    int pbo;
-    glamor_pixmap_private *sub_pixmap_priv;
-
-    if (access != GLAMOR_ACCESS_RO) {
-        sub_pixmap_priv = glamor_get_pixmap_private(sub_pixmap);
-        if (sub_pixmap_priv->base.fbo && sub_pixmap_priv->base.fbo->pbo_valid) {
-            bits = NULL;
-            pbo = sub_pixmap_priv->base.fbo->pbo;
-        }
-        else {
-            bits = sub_pixmap->devPrivate.ptr;
-            pbo = 0;
-        }
-
-        assert(x >= 0 && y >= 0);
-        w = (w > sub_pixmap->drawable.width) ? sub_pixmap->drawable.width : w;
-        h = (h > sub_pixmap->drawable.height) ? sub_pixmap->drawable.height : h;
-        glamor_upload_sub_pixmap_to_texture(pixmap, x, y, w, h,
-                                            sub_pixmap->devKind, bits, pbo);
-    }
-    glamor_destroy_pixmap(sub_pixmap);
-}
diff --git a/glamor/glamor_priv.h b/glamor/glamor_priv.h
index 144cbfd7a..24f8674a2 100644
--- a/glamor/glamor_priv.h
+++ b/glamor/glamor_priv.h
@@ -833,11 +833,6 @@ Bool glamor_upload_sub_pixmap_to_texture(PixmapPtr pixmap, int x, int y, int w,
                                          int h, int stride, void *bits,
                                          int pbo);
 
-PixmapPtr glamor_get_sub_pixmap(PixmapPtr pixmap, int x, int y,
-                                int w, int h, glamor_access_t access);
-void glamor_put_sub_pixmap(PixmapPtr sub_pixmap, PixmapPtr pixmap, int x, int y,
-                           int w, int h, glamor_access_t access);
-
 glamor_pixmap_clipped_regions *
 glamor_compute_clipped_regions(glamor_pixmap_private *priv,
                                RegionPtr region, int *clipped_nbox,